How to calibrate NXT 2.0 Color Sensor?

[mindsqualls]

I don't think that would make it qualify as passive.

I was just quoting the name Lego calls it by in the HDK. The third type they have is "Active sensor" which is the category that the RCX-sensors fits into.

All the sensors is of cause digital, but they use "digital sensor" for the senors that are based on the I2C bus.

[mattallen37]

I didn't know it was in the HDK yet (or was ever going to be, based on what TLG told me).

Passive would be like a switch, photoresistor, thermistor, or other such resistance (or voltage) based sensor.